Problem with compiled kernel 2.6.26fc+ unable to identify cdrom format

[alok pandey]

Update,
Now I can mount that device (cdrom) in ide-mode.(i.e providing kernel boot
parameter as all-generic-ide)
But still no luck with default parameter.

--Is their any way to inform kernel to detect a particular device,partition
in ide mode (actually looking for some thing at boot parameter like
/dev/sdb1=generic-ide) ??

According to log's, My kernel is able to detect the device also I can mount
an iso image with no error(i.e mount -t fs image dir). So what could be
problem in middle? I have checked my cd is also perfect.

Now I am feeling alone, plz show me some way to proceed !!

Btw,
My machine have 32G of Ram. could it be a problem for cdrom ??

--Alok




On 4/14/09, alok pandey <alok.rhct at gmail.com> wrote:
>
> It's happenings with all cd, apparently , that same cd  get mounted
> successfully on other linux machines.
>
> What to do next ..?
> --Alok
>
>
> On 4/13/09, Rick Stevens <ricks at nerd.com> wrote:
>>
>> alok pandey wrote:
>>
>>> HI,
>>> Still waiting for response, putting some more information for your better
>>> understanding.
>>>
>>> Exact error: in dmesg
>>> scsi 4:0:0:0: Direct-Access Dell Virtual Floppy 123 PQ: 0 ANSI: 0 CCS
>>> scsi 3:0:0:0: CD-ROM Dell Virtual CDROM 123 PQ: 0 ANSI: 0 CCS
>>>
>>
>> If you see this, then the kernel knows about your CD-ROM device.  This
>> is not a kernel issue.
>>
>> sd 4:0:0:0: [sdc] Attached SCSI removable disk
>>>  "ISOFS: Unable to identify CD-ROM format"
>>>
>>
>> That's pretty obvious.  The CD isn't burned correctly.
>>
>> Btw, I can mount ISO image successfully (i.e mount -t iso9660 -o lo
>>> /path/to/image /mount/point), So i am sure FS is well supported.
>>>
>>
>> It is.  This is not a kernel or FS issue, it's a media problem.  The CD
>> you're feeding your machine is NOT an ISO9660 CD.  The ISO image is
>> fine since you can mount it via loopback, but the CD itself is burned
>> incorrectly.
>>
>>
>>> Attaching my config files as.
>>> LSPCI.txt :-> output of LSPCI command
>>> image-kernel-smpx86.conf:-> Kernel config paramater
>>> Bootfloppy-kernelXX.conf:->Boot image kernel config
>>>
>>> I have compiled the kernel to support cd-rom with my best linux
>>> knowledge,
>>> but unfortunately it's not working for me. I am quit sure that my kernel
>>> have all the required option enabled , it seems to me as kernel bug.
>>>
>>> You comment/suggestion is needed. Plz help.
>>>
>>> Thanks
>>> Alok Pandey
>>>
>>> On 4/10/09, alok pandey <alok.rhct at gmail.com> wrote:
>>>
>>>> HI All,
>>>> Recently  I compiled a linux fedora kernel (2.6.27fc_x86_64bit) for
>>>> stata
>>>> support. After successful compilation and installation with new kernel,
>>>> :-
>>>>  --System is not able to mount cdrom.
>>>>  --Always generate error, "medium not found"
>>>> --dmesg have an  entry some thing like " unable to understand cdrom
>>>> format"
>>>>
>>>> I don't know what went wrong, but i cross checked my new kernel config
>>>> and
>>>> my new kernel have following support:- (in respect of cdrom)
>>>>  --SCSI device drive support [*]
>>>> --iso9660 file system support [*]
>>>> --ata-ide device support [*]
>>>>
>>>> I am attaching my kernel.conf file as attachment for better
>>>> understanding.
>>>> let me know if some other information is need in order to understand my
>>>> issue.
>>>>
>>>> Also,
>>>> I am highly confused in selection of modules as static or dynamic. It
>>>> will
>>>> be great help if any one can suggest me the rule/law behind dynamic[M]
>>>> and
>>>> static[*] selection of kernel modules.
>>>>
>>>> *I just need to ask , what if i select all kernel modules as lodable
>>>> modules [M] instead of static modules [*] or vice versa !!
>>>>
>>>> Thanks
>>>> -A
>>>>
>>>>
>>>
>>>
>>>
>>> ------------------------------------------------------------------------
>>>
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>>
>>
>> --
>> ----------------------------------------------------------------------
>> - Rick Stevens, Systems Engineer                      ricks at nerd.com -
>> - AIM/Skype: therps2        ICQ: 22643734            Yahoo: origrps2 -
>> -                                                                    -
>> -                      LOOK OUT!!! BEHIND YOU!!!                     -
>> ----------------------------------------------------------------------
>>
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>
>
>
> --
> Thanks
> ALOK PANDEY




-- 
Thanks
ALOK PANDEY
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